the government finds exporting it is better than keeping it here at home. >> apple as we mentioned in the spotlight today, shares of the tech giant coming off their worst day in four years, sliding back into bear market territory. the one day loss erased nearly $35 billion in market cap. that chunk is bigger than 400 other s&p 500 companies. apple ceo tim cook talked to nbc's brian williams in our rock center exclusive. >> why can't you be a made in america company? >> you know, this i found, as a matter of fact, the engine in here is made in america. and not only are the engines in here made in america, but engines are made in america and are exported. the glass on this phone is made in kentucky. so we have been working for years on doing more and more in the united states, next year, we will do one of our existing mac lines in the united states. >> you can see the entire interview with tim cook tonight on rock center, that's 10:00 eastern time on your local nbc station, but for now investors are watching the market. apple shares 5.31, which is close to the main lows. this is close t